How should the consultant accomplish this task?

A development director needs to understand which organizations have given to the nonprofit in some year prior to the current, but have not contributed to the nonprofit in the current year.

How should the consultant accomplish this task?
A . Customize the date range on the NPSP SYBUNT report for Accounts
B. Customize the date range on the NPSP SYBUNT report for Contacts
C. Create an Opportunity report that compares Contact donations from the previous fiscal year to the current
D. Customize the date range on the NPSP LYBUNT report for Accounts

Answer: B